Harden LA publishers and add multi-relay guide

evolution/proposals/ECP-0120-material-watch-surface.md

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+# ECP-0120: Material Watch Surface
+
+Status: Draft
+
+## Problem statement
+
+The web watch page should feel like a real television/player surface, not a protocol console,
+marketing page, or dark decorative shell. It also needs room for modern watch behaviors: channel
+switching, multiview, scrubbing, clipping, direct tuning, and DVR mode.
+
+## Constraints
+
+- Preserve existing live WebTransport playback, DVR replay, public station scanning, share links,
+  and manual signal tuning.
+- Keep the first screen content/player-first and operable with obvious controls.
+- Use YouTube as interaction grammar, not as visual branding.
+- Keep the palette bright enough for daytime/living-room use.
+- Do not rely on browser-specific copy.
+
+## Alternatives considered
+
+- Continue the dark broadcast-console skin from ECP-0118. Rejected because it reads too much like
+  a control-room hero image and too little like a daily-use player.
+- Copy YouTube visually. Rejected because every.channel should inherit watch-page mechanics without
+  borrowing YouTube brand language.
+- Use pure flat CSS. Rejected because the desired direction is a tactile television object with
+  material depth.
+
+## Decision
+
+Rebuild the static web watch surface around a large video player, right-side channel rail, lower
+scrubber, clip controls, and multiview tray. Use generated bitmap material assets for live-preview
+tiles and subtle hardware texture, then layer a lighter skeuomorphic system in CSS: warm wood,
+brushed metal, smoked acrylic, cream buttons, and broadcast-monitor geometry.
+
+The design lineage is intentionally loose: Braun/Ulm clarity for simple control layout, Sony-style
+broadcast monitor seriousness for the player frame, and Bang & Olufsen-style furniture warmth for
+the room/object feel. These references are constraints, not objects to copy.
+
+## Rollout / teardown plan
+
+Ship as a static web UI change and validate with desktop/mobile screenshots plus the web build.
+Teardown is reverting the HTML/CSS shell to the previous watch page while leaving playback,
+directory, and share-link code paths intact.